Make handshake dependencies optional.

Cargo.toml

@@ -18,7 +18,8 @@ include = ["benches/**/*", "src/**/*", "LICENSE-*", "README.md", "CHANGELOG.md"]
 all-features = true
 
 [features]
-default = []
+default = ["handshake"]
+handshake = ["base64", "http", "httparse", "sha1", "url"]
 native-tls = ["native-tls-crate"]
 native-tls-vendored = ["native-tls", "native-tls-crate/vendored"]
 rustls-tls-native-roots = ["__rustls-tls", "rustls-native-certs"]
@@ -26,16 +27,16 @@ rustls-tls-webpki-roots = ["__rustls-tls", "webpki-roots"]
 __rustls-tls = ["rustls", "webpki"]
 
 [dependencies]
-base64 = "0.13.0"
+base64 = { version = "0.13.0", optional = true }
 byteorder = "1.3.2"
 bytes = "1.0"
-http = "0.2"
+http = { version = "0.2", optional = true }
-httparse = "1.3.4"
+httparse = { version = "1.3.4", optional = true }
 log = "0.4.8"
 rand = "0.8.0"
-sha1 = "0.10"
+sha1 = { version = "0.10", optional = true }
 thiserror = "1.0.23"
-url = "2.1.0"
+url = { version = "2.1.0", optional = true }
 utf-8 = "0.7.5"
 
 [dependencies.native-tls-crate]

src/error.rs

@@ -3,6 +3,7 @@
 use std::{io, result, str, string};
 
 use crate::protocol::{frame::coding::Data, Message};
+#[cfg(feature = "handshake")]
 use http::{header::HeaderName, Response};
 use thiserror::Error;
 
@@ -63,9 +64,11 @@ pub enum Error {
     Url(#[from] UrlError),
     /// HTTP error.
     #[error("HTTP error: {}", .0.status())]
+    #[cfg(feature = "handshake")]
     Http(Response<Option<String>>),
     /// HTTP format error.
     #[error("HTTP format error: {0}")]
+    #[cfg(feature = "handshake")]
     HttpFormat(#[from] http::Error),
 }
 
@@ -81,36 +84,42 @@ impl From<string::FromUtf8Error> for Error {
     }
 }
 
+#[cfg(feature = "handshake")]
 impl From<http::header::InvalidHeaderValue> for Error {
     fn from(err: http::header::InvalidHeaderValue) -> Self {
         Error::HttpFormat(err.into())
     }
 }
 
+#[cfg(feature = "handshake")]
 impl From<http::header::InvalidHeaderName> for Error {
     fn from(err: http::header::InvalidHeaderName) -> Self {
         Error::HttpFormat(err.into())
     }
 }
 
+#[cfg(feature = "handshake")]
 impl From<http::header::ToStrError> for Error {
     fn from(_: http::header::ToStrError) -> Self {
         Error::Utf8
     }
 }
 
+#[cfg(feature = "handshake")]
 impl From<http::uri::InvalidUri> for Error {
     fn from(err: http::uri::InvalidUri) -> Self {
         Error::HttpFormat(err.into())
     }
 }
 
+#[cfg(feature = "handshake")]
 impl From<http::status::InvalidStatusCode> for Error {
     fn from(err: http::status::InvalidStatusCode) -> Self {
         Error::HttpFormat(err.into())
     }
 }
 
+#[cfg(feature = "handshake")]
 impl From<httparse::Error> for Error {
     fn from(err: httparse::Error) -> Self {
         match err {
@@ -138,6 +147,7 @@ pub enum CapacityError {
 }
 
 /// Indicates the specific type/cause of a protocol error.
+#[allow(missing_copy_implementations)]
 #[derive(Error, Debug, PartialEq, Eq, Clone)]
 pub enum ProtocolError {
     /// Use of the wrong HTTP method (the WebSocket protocol requires the GET method be used).
@@ -169,12 +179,14 @@ pub enum ProtocolError {
     CustomResponseSuccessful,
     /// Invalid header is passed. Or the header is missing in the request. Or not present at all. Check the request that you pass.
     #[error("Missing, duplicated or incorrect header {0}")]
+    #[cfg(feature = "handshake")]
     InvalidHeader(HeaderName),
     /// No more data while still performing handshake.
     #[error("Handshake not finished")]
     HandshakeIncomplete,
     /// Wrapper around a [`httparse::Error`] value.
     #[error("httparse error: {0}")]
+    #[cfg(feature = "handshake")]
     HttparseError(#[from] httparse::Error),
     /// Not allowed to send after having sent a closing frame.
     #[error("Sending after closing is not allowed")]

src/lib.rs

@@ -12,13 +12,17 @@
     unused_import_braces
 )]
 
+#[cfg(feature = "handshake")]
 pub use http;
 
 pub mod buffer;
+#[cfg(feature = "handshake")]
 pub mod client;
 pub mod error;
+#[cfg(feature = "handshake")]
 pub mod handshake;
 pub mod protocol;
+#[cfg(feature = "handshake")]
 mod server;
 pub mod stream;
 #[cfg(any(feature = "native-tls", feature = "__rustls-tls"))]
@@ -29,10 +33,14 @@ const READ_BUFFER_CHUNK_SIZE: usize = 4096;
 type ReadBuffer = buffer::ReadBuffer<READ_BUFFER_CHUNK_SIZE>;
 
 pub use crate::{
-    client::{client, connect},
     error::{Error, Result},
-    handshake::{client::ClientHandshake, server::ServerHandshake, HandshakeError},
     protocol::{Message, WebSocket},
+};
+
+#[cfg(feature = "handshake")]
+pub use crate::{
+    client::{client, connect},
+    handshake::{client::ClientHandshake, server::ServerHandshake, HandshakeError},
     server::{accept, accept_hdr, accept_hdr_with_config, accept_with_config},
 };
 

tests/no_send_after_close.rs

@@ -8,10 +8,12 @@ use std::{
     time::Duration,
 };
 
+#[cfg(feature = "handshake")]
 use tungstenite::{accept, connect, error::ProtocolError, Error, Message};
 use url::Url;
 
 #[test]
+#[cfg(feature = "handshake")]
 fn test_no_send_after_close() {
     env_logger::init();
 

tests/receive_after_init_close.rs

@@ -8,10 +8,12 @@ use std::{
     time::Duration,
 };
 
+#[cfg(feature = "handshake")]
 use tungstenite::{accept, connect, Error, Message};
 use url::Url;
 
 #[test]
+#[cfg(feature = "handshake")]
 fn test_receive_after_init_close() {
     env_logger::init();